mart-ire



G. DI P. MART'IRE.

IGNITION MAGNETO. SWITCH F OR INTERNAL COMBUSTION ENGINES. APPLICATION FILED MAY 21. 1918.

1,308,503. Patented July 1, 1919.

G. D! P. MARTIRE. IGNITIONVMAGNETO swncn FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 2l Patented July 1, 1919.

2 SHEETSSHEET 2.

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GIUSEPPE DI PIETRO MARTIRE, OF MILAN, ITALY.

IGNITION-MAGNETU SWITCH FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent,

Patented J uly l, 1919..

Application filed May 21,1918. Serial No. 235,841.

To all whom it may concern:

Be it known that l, Gmsnrerz DI Pis'rno MARTIRE, subject of the King of ltaly, resident of Milan, in the Kingdom of ltaly,

have invented new and useful Improvements in Ignition-Magneto Switches for Internal- Combustion Engines, of which the following is a specification.

The present invention has for its object a switch specially adapted for actuating one or more internal combustion engines by means of either or both of two ignition magnetos during the ordinary running of the engines, the starting of one or more ,of the engines being eventually eilected by a single ignition magneto,- and each engine and each magneto being independently operated.

Figures 1 to 4: in the annex-ed drawing illustrate by way of exampleonemode of execution for the case of two engines capabio of being started independently with a single starting magneto; the construction however can be adapted to any number of engines. lt is further understood that the constructional and form details may be varied from those described and illustrated without departing from the spirit and scope of the invention.

Fig. 1 is a front View.

Fig. 2 is a cross section.

Fig. 3 is an internal view of the device as seen looking toward the cover.

' Fig. 4 is an internal view of the device as seen looking toward the base.

Fig. 5 shows in section a simplified form applicable when the apparatus has to work as an interrupter instead of as a changeover switch.

Fig. 6 is a section on the line 6 -6 in connected to m,' and the leads from the ignition magnetos l[ll[ are connected to the terminals 0 -c I A is a lever by means of which the contact member# can be brought into contact.

with the buttons M +-M and the-starting magneto (which is connected to --m"-) can be connected up to one or the othel of the two engines. The button+ serves to insert, by means of a spring changeover switch t, of Well known construction, a battery of storage cells in lieu of the starting magneto. A spring ufitted to the lever A and a segment --c provided with notches or stops serve to lock the lever A in position.

For each engine a setof buttons 2, respectively 2,, is provided, thesebuttons constituting multiple con'imutators for connecting up the respective engine to either or both of its ignition magnetos. When in either set the button 2 or 2., bearing the double figure (12) is depressed, both magnetos l and H of the corresponding engine are set into operation. When button 1 is depressed, the magneto H is disconnected and only the magneto I remains inoperation. When button 2 is depressed, the magneto H is con-' nected up and the magneto l disconnected. When button 0 is depressed, both magnetos are disconnected and the engine is stopped,

ln order to automatically release the button or buttons prev'iously depressedand therewith break the connections established by the samewhen any other button is depressed, a disk D adapted to swing on its spindle is provided, for each set of buttons.

.All around the periphery of each disk a number of holes is formed equal to the number of buttons of the respective set. In these holes are apt to slide the conical portions gof the contact spindles a-, the larger bases of the cones -q equaling the holes in diameter. Each disk D is springloaded, the spring causing the holes always 7 to bear against the spindles -sand there with to lie eccentrically in relationto the cones The contact half-rings it,--h are connected to the terminals --c,-0 by .f,,f on one side and to the contact members of the buttons 1 and 2 by g --g on the other side. The button (12) makes a. direct contact with the halt-rings through the cones q-'. The spindle correspondin to the button Omakes no contact, and eac spindle is placed under the action of a spring tending to force it outward.-

When any-of the buttons is depressed, the corresponding cone enters a disk hole and, due to its eccentricity, causes the disk to swing-through a certain angle, after which the disk-spring brings the disk back into contact with the spindle andlocks' the spindle in the new position, the spindle being thus prevented from moving outward oi? the did hole and the contact established by the same being thus maintained.

Later, when any other button is depressed, the disk is swung again through a certain angle, whereby the hole corresponding to the button previously depressed is brought to lie concentrically to .the corresponding conefthis latter is accordingly allowed to spring outward of the hole and to break the former contact, while the connection established through the latest button operation is rendered permanent.

By depressing the button 0 all other contacts are broken without establishing any new one.

The operations of the various magnetos and motors as well as the trip gear for the break of the contacts are entirely independent from one another, and the buttons can be operated in any sequence whatever without any prestablished order.

When it is only the question of establishing the connection between the starting magneto and the engine, a simpler form of the device can be adopted as shown in Figs. 5

and 6. The motor is connected to M andthe starting magneto to n t. The two buttons 2 2 by means of cones Q4, actuate a swinging plate p-, which is placed under the action of springs j in'such a way that the opposite sides of the holes -0- formed in the plate p, due to the springs j'-, arecaused to bear againstthe button spindles -sand to lie eccentrically in relation to the spindle cones -q,q When 'z, is depressed, the opposlte end of the corresponding spindle operates a lever Z- electrically connected to mand causes it to make contact with M, this contact being maintained until thebutton a is depressed,

. thereby in consequence of the swing of p-,

the cone g tact broken.

Figs. 7 and 8 illustrate a similar device with buttons -z,, in any number whatever, arranged in a straight line and coopbeing released and the conerating with a plate w,-, fitted with holes wwhich by a spring j. are normally held agziinst the spindle.s,. When a button is depressed, the plate w, is

' ing theplate when the cone moved endwise and the cone corresponding to the depressed button gets through and past the corresponding plate-hole, wh1le any other spindle whose cone happens to lie below the opposite face of the plate is suddenly drawn upward by a spring with which through a single starting magneto, and a contact-button disk for each motor, by means of which disks each motor is connected up to one or the other or both of its ignition magnetos, each contact-button actuating a spindle fitted with a cone adapted to slide in a hole formed in the disk, and each disk bein'gloaded by a spring that tends to maintain the disk holes eccentrical relatively to the spindle cones so that, when a contact-button is depressed and the corresponding spindle and cone move axially, the disk swings through a certain angle and lets the cone of the actuated spindle pass through the corresponding holes and allows the spindles of the buttons previously depressed to spring back.

2. Ignition magneto switch for interrupting the ignition circuit of an internal combustion engine, comprising a plate adapted to swing about its pivot under the action of a spring and fitted withholes at each end, two buttons adapted to cooperate with the said holes, each button actuating a spindle fitted with a cone for the purpose of swingpasses through the corresponding disk hole and of preventing the buttons return, while either button releases the other, and a contact plate actuated by one of the said buttons, substantially as described and illustrated.

In testimony thereof I aflix my signature.

GIUSEPPE DI PIETRO MAR'IIRE. 

